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<div class="title">centerOfMass.hpp</div>  </div>
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<a href="center_of_mass_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160; </div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_static_asserts_8hpp.html">NumCpp/Core/Internal/StaticAsserts.hpp</a>&quot;</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_stl_algorithms_8hpp.html">NumCpp/Core/Internal/StlAlgorithms.hpp</a>&quot;</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_core_2_shape_8hpp.html">NumCpp/Core/Shape.hpp</a>&quot;</span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_types_8hpp.html">NumCpp/Core/Types.hpp</a>&quot;</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_nd_array_8hpp.html">NumCpp/NdArray.hpp</a>&quot;</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160; </div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacenc.html">nc</a></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;{</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    <span class="comment">//============================================================================</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    <span class="comment">// Method Description:</span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="comment"></span>    <span class="keyword">template</span>&lt;<span class="keyword">typename</span> dtype&gt;</div>
<div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="namespacenc.html#a830888da11b33ea36bf4fc580d8c4757">   47</a></span>&#160;    <a class="code" href="classnc_1_1_nd_array.html">NdArray&lt;double&gt;</a> <a class="code" href="namespacenc.html#a830888da11b33ea36bf4fc580d8c4757">centerOfMass</a>(<span class="keyword">const</span> <a class="code" href="classnc_1_1_nd_array.html">NdArray&lt;dtype&gt;</a>&amp; inArray, <a class="code" href="namespacenc.html#a5edb9ac6f596ae1256faa3f5d797dc84">Axis</a> inAxis = <a class="code" href="namespacenc.html#a5edb9ac6f596ae1256faa3f5d797dc84ab50339a10e1de285ac99d4c3990b8693">Axis::NONE</a>) </div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    {</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;        <a class="code" href="_static_asserts_8hpp.html#a36abb32368b91aed0d3133a4cfd5ae92">STATIC_ASSERT_ARITHMETIC</a>(dtype);</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160; </div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;        <span class="keyword">const</span> <a class="code" href="classnc_1_1_shape.html">Shape</a> <a class="code" href="namespacenc.html#ae2b224742bc8263190d451a44ebe5e34">shape</a> = inArray.<a class="code" href="classnc_1_1_nd_array.html#a2d1b4adfe3c9897ffe3dca45e357b2b4">shape</a>();</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160; </div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;        <span class="keywordflow">switch</span> (inAxis)</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;        {</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;            <span class="keywordflow">case</span> <a class="code" href="namespacenc.html#a5edb9ac6f596ae1256faa3f5d797dc84ab50339a10e1de285ac99d4c3990b8693">Axis::NONE</a>:</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;            {</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;                <span class="keywordtype">double</span> inten = 0.0;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;                <span class="keywordtype">double</span> rowCenter = 0.0;</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;                <span class="keywordtype">double</span> colCenter = 0.0;</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;                </div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;                <span class="keywordflow">for</span> (<a class="code" href="namespacenc.html#af0f49663fb63332596e2e6327009d581">uint32</a> row = 0; row &lt; <a class="code" href="namespacenc.html#ae2b224742bc8263190d451a44ebe5e34">shape</a>.<a class="code" href="classnc_1_1_shape.html#a6f89f699dea6eb89eef19e00c92b223a">rows</a>; ++row)</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;                {</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;                    <span class="keywordflow">for</span> (<a class="code" href="namespacenc.html#af0f49663fb63332596e2e6327009d581">uint32</a> col = 0; col &lt; <a class="code" href="namespacenc.html#ae2b224742bc8263190d451a44ebe5e34">shape</a>.<a class="code" href="classnc_1_1_shape.html#aae1a3c997648aacaefb60d0e6d0bf10d">cols</a>; ++col)</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;                    {</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;                        <span class="keyword">const</span> <span class="keyword">auto</span> pixelValue = <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(inArray(row, col));</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160; </div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;                        inten += pixelValue;</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;                        rowCenter += pixelValue * <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(row);</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;                        colCenter += pixelValue * <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(col);</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;                    }</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;                }</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160; </div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;                rowCenter /= inten;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;                colCenter /= inten;</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160; </div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;                <span class="keywordflow">return</span> { rowCenter, colCenter };</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;            }</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;            <span class="keywordflow">case</span> <a class="code" href="namespacenc.html#a5edb9ac6f596ae1256faa3f5d797dc84a54c1ed33c810f895d48c008d89f880b7">Axis::ROW</a>:</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;            {</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;                <a class="code" href="classnc_1_1_nd_array.html">NdArray&lt;double&gt;</a> returnArray(1, <a class="code" href="namespacenc.html#ae2b224742bc8263190d451a44ebe5e34">shape</a>.<a class="code" href="classnc_1_1_shape.html#aae1a3c997648aacaefb60d0e6d0bf10d">cols</a>);</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;                returnArray.<a class="code" href="classnc_1_1_nd_array.html#acac210ad3d3bd973be4bece6e6b625ed">zeros</a>();</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160; </div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;                <span class="keyword">const</span> <a class="code" href="classnc_1_1_nd_array.html">NdArray&lt;double&gt;</a> inten = inArray.template astype&lt;double&gt;().<a class="code" href="classnc_1_1_nd_array.html#a467700098b002b5631c756ca0fd50cae">sum</a>(inAxis);</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160; </div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;                <span class="keywordflow">for</span> (<a class="code" href="namespacenc.html#af0f49663fb63332596e2e6327009d581">uint32</a> colIdx = 0; colIdx &lt; <a class="code" href="namespacenc.html#ae2b224742bc8263190d451a44ebe5e34">shape</a>.<a class="code" href="classnc_1_1_shape.html#aae1a3c997648aacaefb60d0e6d0bf10d">cols</a>; ++colIdx)</div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;                {</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;                    <span class="keywordflow">for</span> (<a class="code" href="namespacenc.html#af0f49663fb63332596e2e6327009d581">uint32</a> rowIdx = 0; rowIdx &lt; <a class="code" href="namespacenc.html#ae2b224742bc8263190d451a44ebe5e34">shape</a>.<a class="code" href="classnc_1_1_shape.html#a6f89f699dea6eb89eef19e00c92b223a">rows</a>; ++rowIdx)</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;                    {</div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;                        returnArray(0, colIdx) += <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(inArray(rowIdx, colIdx)) * <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(rowIdx);</div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;                    }</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160; </div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;                    returnArray(0, colIdx) /= inten[colIdx];</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;                }</div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160; </div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;                <span class="keywordflow">return</span> returnArray;</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;            }</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;            <span class="keywordflow">case</span> <a class="code" href="namespacenc.html#a5edb9ac6f596ae1256faa3f5d797dc84aa44a065875f5d66d41474bb9bfb0ce05">Axis::COL</a>:</div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;            {</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;                <a class="code" href="classnc_1_1_nd_array.html">NdArray&lt;double&gt;</a> returnArray(1, <a class="code" href="namespacenc.html#ae2b224742bc8263190d451a44ebe5e34">shape</a>.<a class="code" href="classnc_1_1_shape.html#a6f89f699dea6eb89eef19e00c92b223a">rows</a>);</div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;                returnArray.<a class="code" href="classnc_1_1_nd_array.html#acac210ad3d3bd973be4bece6e6b625ed">zeros</a>();</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160; </div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;                <span class="keyword">const</span> <a class="code" href="classnc_1_1_nd_array.html">NdArray&lt;double&gt;</a> inten = inArray.template astype&lt;double&gt;().<a class="code" href="classnc_1_1_nd_array.html#a467700098b002b5631c756ca0fd50cae">sum</a>(inAxis);</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160; </div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;                <span class="keywordflow">for</span> (<a class="code" href="namespacenc.html#af0f49663fb63332596e2e6327009d581">uint32</a> rowIdx = 0; rowIdx &lt; <a class="code" href="namespacenc.html#ae2b224742bc8263190d451a44ebe5e34">shape</a>.<a class="code" href="classnc_1_1_shape.html#a6f89f699dea6eb89eef19e00c92b223a">rows</a>; ++rowIdx)</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;                {</div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;                    <span class="keywordflow">for</span> (<a class="code" href="namespacenc.html#af0f49663fb63332596e2e6327009d581">uint32</a> colIdx = 0; colIdx &lt; <a class="code" href="namespacenc.html#ae2b224742bc8263190d451a44ebe5e34">shape</a>.<a class="code" href="classnc_1_1_shape.html#aae1a3c997648aacaefb60d0e6d0bf10d">cols</a>; ++colIdx)</div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;                    {</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;                        returnArray(0, rowIdx) += <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(inArray(rowIdx, colIdx)) * <span class="keyword">static_cast&lt;</span><span class="keywordtype">double</span><span class="keyword">&gt;</span>(colIdx);</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;                    }</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160; </div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;                    returnArray(0, rowIdx) /= inten[rowIdx];</div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;                }</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160; </div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;                <span class="keywordflow">return</span> returnArray;</div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;            }</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;            <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;            {</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;                <a class="code" href="_error_8hpp.html#af2aff1172060367b9c5398fa097fa8fd">THROW_INVALID_ARGUMENT_ERROR</a>(<span class="stringliteral">&quot;Unimplemented axis type.&quot;</span>);</div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;                <span class="keywordflow">return</span> {}; <span class="comment">// get rid of compiler warning</span></div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;            }</div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;        }</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;    }</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;} <span class="comment">// namespace nc</span></div>
</div><!-- fragment --></div><!-- contents -->
</div><!-- doc-content -->
<div class="ttc" id="a_static_asserts_8hpp_html"><div class="ttname"><a href="_static_asserts_8hpp.html">StaticAsserts.hpp</a></div></div>
<div class="ttc" id="aclassnc_1_1_nd_array_html_a2d1b4adfe3c9897ffe3dca45e357b2b4"><div class="ttname"><a href="classnc_1_1_nd_array.html#a2d1b4adfe3c9897ffe3dca45e357b2b4">nc::NdArray::shape</a></div><div class="ttdeci">Shape shape() const noexcept</div><div class="ttdef"><b>Definition:</b> NdArrayCore.hpp:4356</div></div>
<div class="ttc" id="anamespacenc_html_a5edb9ac6f596ae1256faa3f5d797dc84ab50339a10e1de285ac99d4c3990b8693"><div class="ttname"><a href="namespacenc.html#a5edb9ac6f596ae1256faa3f5d797dc84ab50339a10e1de285ac99d4c3990b8693">nc::Axis::NONE</a></div><div class="ttdeci">@ NONE</div></div>
<div class="ttc" id="a_static_asserts_8hpp_html_a36abb32368b91aed0d3133a4cfd5ae92"><div class="ttname"><a href="_static_asserts_8hpp.html#a36abb32368b91aed0d3133a4cfd5ae92">STATIC_ASSERT_ARITHMETIC</a></div><div class="ttdeci">#define STATIC_ASSERT_ARITHMETIC(dtype)</div><div class="ttdef"><b>Definition:</b> StaticAsserts.hpp:37</div></div>
<div class="ttc" id="anamespacenc_html_a5edb9ac6f596ae1256faa3f5d797dc84a54c1ed33c810f895d48c008d89f880b7"><div class="ttname"><a href="namespacenc.html#a5edb9ac6f596ae1256faa3f5d797dc84a54c1ed33c810f895d48c008d89f880b7">nc::Axis::ROW</a></div><div class="ttdeci">@ ROW</div></div>
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<div class="ttc" id="aclassnc_1_1_shape_html_a6f89f699dea6eb89eef19e00c92b223a"><div class="ttname"><a href="classnc_1_1_shape.html#a6f89f699dea6eb89eef19e00c92b223a">nc::Shape::rows</a></div><div class="ttdeci">uint32 rows</div><div class="ttdef"><b>Definition:</b> Core/Shape.hpp:44</div></div>
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